Conservation Foundation, Darling, F. . F., & Milton, J. P. (1966). Future environments of North America: Being the record of a conference convened by the Conservation Foundation in April, 1965, at Airlie House, Warenton, Virginia. Natural History Press.
Trích dẫn kiểu Chicago (xuất bản lần thứ 7)Conservation Foundation, Frank Fraser Darling, và John P. Milton. Future Environments of North America: Being the Record of a Conference Convened by the Conservation Foundation in April, 1965, at Airlie House, Warenton, Virginia. Garden City, N.Y: Natural History Press, 1966.
Trích dẫn kiểu MLA (xuất bản lần thứ 9)Conservation Foundation, et al. Future Environments of North America: Being the Record of a Conference Convened by the Conservation Foundation in April, 1965, at Airlie House, Warenton, Virginia. Natural History Press, 1966.